func unmarshal(s sql.Scanner, b []byte) error {
var d interface{}
if err := json.Unmarshal(b, &d); err != nil {
return err
}
return s.Scan(d)
}
func decodeScanner(scanner sql.Scanner, b []byte) error {
if b == nil {
return scanner.Scan(nil)
}
return scanner.Scan(b)
}
