While I have not tried it, it would be nice to explicitly support MariaDB. It's a branch of MySQL so it should not be too hard. Or at least document if it does / does not work.
As of now, it is not under our near future radar. But we are glad you created this "Idea" ticket, so in case there are lot of user votes for this, we can change priorities and work on this first.
So far, regarding database support we have following in pipeline:
1) MySQL reverse engineering
2) PostgreSQL support
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