type Batch interface {
	Append(v ...interface{}) error
	Column(int) BatchColumn
	Send() error
}

type BatchColumn interface {
	Append(interface{}) error
}

type Block interface {
	Rows() int
}

type Conn interface {
	ServerVersion() (*ServerVersion, error)
	Select(ctx context.Context, dest interface{}, query string, args ...interface{}) error
	Query(ctx context.Context, query string, args ...interface{}) (Rows, error)
	QueryRow(ctx context.Context, query string, args ...interface{}) Row
	PrepareBatch(ctx context.Context, query string) (Batch, error)
	Exec(ctx context.Context, query string, args ...interface{}) error
	Ping(context.Context) error
	Stats() Stats
	Close() error
}

type NamedValue struct {
	Name  string
	Value interface{}
}

type Row interface {
	Err() error
	Scan(dest ...interface{}) error
	ScanStruct(dest interface{}) error
}

type Rows interface {
	Next() bool
	Scan(dest ...interface{}) error
	ScanStruct(dest interface{}) error
	Totals(dest ...interface{}) error
	Columns() []string
	Close() error
	Err() error
}

type ServerVersion = proto.ServerHandshake

type Stats struct {
	MaxOpenConns int
	MaxIdleConns int
	Open         int
	Idle         int
}