func DBGetAdd(t string, n string, v string) map[string]string {
sql := "insert into "+t+"("+n+") values("+v+")"
//
ret, err := DB.Exec(sql);
d := map[string]string{}
if err != nil {
fmt.Println(err)
fmt.Printf("%T\n",err)
d["state"] = "error"
d["data"] = "error"
return d
}
}insert a piece of data into mysql. I want to return the contents in err and find that err is * mysql.MySQLError type. How to use err as string