It says right in the list of supported DBs "Your own easily implemented adapter"...

		lostapathy on March 8, 2018 \| parent \| context \| favorite \| on: Vim-db: Modern database interface for Vim It says right in the list of supported DBs "Your own easily implemented adapter" - it's definitely something that can be added. Odds are he built it to use the DBs he uses, now it's your turn to contribute back the adapter for the DB you use.