Feature request: ORM support

[SpencerC]

Overview

The only thing better than a Go gRPC API would be if you guys made it easy to get the data out of protos and into local structures.

How it might look

type Person struct {
	ID   uuid.UUID `db:"id"`
	Name string    `db:"name"`
	Age  int64     `db:"age"`
}

// Do expensive reflection work ahead of time.
var peopleStruct = client.NewStruct(&Person{})

func main() {
	c, err := client.NewStargateClientWithConn(conn)
	if err != nil {
		log.Fatalf("error creating Stargate client: %v", err)
	}

	res, err := c.ExecuteQuery(
		&pb.Query{
			Cql: "SELECT (id, name, age) FROM people",
		},
	)
	if err != nil {
		log.Fatalf("error executing query: %v", err)
	}

	// CURRENT APPROACH
	rows := res.GetResultSet().GetRows()
	ppl := make([]*Person, 0, len(rows))
	for _, row := range rows {
		vals := row.GetValues()
		ppl = append(ppl, &Person{
			ID:   client.ToUUID(vals[0]),
			Name: client.ToString(vals[1]),
			Age: client.ToInt(vals[2]),
		})
	}
	
	/// DESIRED APPROACH
	ppl, err := peopleStruct.Scan(res) // []*People, error
	if err != nil {
		log.Fatalf("error scanning results to dataset: %v", err)
	}
}

Helpful Links

https://github.com/huandu/go-sqlbuilder#using-struct-as-a-light-weight-orm
https://gist.github.com/sosedoff/b373623a9572cf1a992486d2d87dcd85
https://stackoverflow.com/questions/10858787/what-are-the-uses-for-tags-in-go