fix database error

starainrt.go

@@ -780,6 +780,8 @@ func FetchAll(rows *sql.Rows) (error, map[int]map[string]string) {
 			switch vtype := col.(type) {
 			case int64:
 				record[columns[i]] = strconv.FormatInt(vtype, 10)
+			case string:
+				record[columns[i]] = vtype
 			default:
 				record[columns[i]] = string(vtype.([]byte))
 			}
@@ -793,6 +795,10 @@ func FetchAll(rows *sql.Rows) (error, map[int]map[string]string) {
 func OpenDB(Method, ConnStr string) error {
 	var err error
 	DBRes, err = sql.Open(Method, ConnStr)
+	if err != nil {
+		return err
+	}
+	err = DBRes.Ping()
 	return err
 }
 func CloseDB() {