Why add it as a concern to a database engine when it's down to the individual use case? I mean, there's hundreds of database migration tools out there, all you need to do - as a developer, that's your job - is to add some automation to your git repository and database server's master to run a migration. Set up a cron job to pull every X minutes, set up a post-merge hook to run those migrations. Simples. Just use straight SQL files for these migrations.