AWS needs something like this. The missing piece for the AWS serverless story is a database that is suitable for writing real world applications. DynamoDB is far from suitable for that task, which leaves AWS serverless with no good database.
AWS has RDS - That's most certainly a database suitable for writing real world applications as its MySQL. Does serverless somehow mandate a non SQL solution?
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcom...