You won't be able to scan the DB directly in any meaningful way (ie the contents of the DB).
Better to exclude it from scanning in VSEL otherwise it will be hitting 10Gb for no good reason.
However If the content being added to the DB is written to the local disk before being committed to the DB this would be the place to scan and VSEL should hopefully do it automatically.
Otherwise perhaps the content will be scanned on extraction from the DB.
Best thing would be to test with Eicar and see what happens.