I'm not a DB expert so I don't know much about stored procedures. Given that I'm trying to stay compatible with all of sqlite/mysql/postgresql, it might be diff

I'm not a DB expert so I don't know much about stored procedures. Given that I'm trying to stay compatible with all of sqlite/mysql/postgresql, it might be difficult to rely on stored procedures horizontally. A read-only view would be possible, the schema is quite simple. If you want, you could create an issue for that! Keep in mind that the DB schema is more of an implementation detail than a public API, so I'm not going to consider an (automatically-migrated) schema change as a breaking change.