Flatten(): render even large numbers as-is, not using scientific nota…

…tion

E.g. 2000000000000000000 (explicitly), not 2e+18 (as with fmt.Sprintf("%v")).

pkg/flatten/flatten.go

@@ -34,9 +34,14 @@ func Flatten(value interface{}, prefix string) map[string]types.String {
 			}
 		default:
 			val := "null"
-			if value != nil {
+			switch v := value.(type) {
+			case nil:
+			case float64:
+				val = strconv.FormatFloat(v, 'f', -1, 64)
+			default:
 				val = fmt.Sprintf("%v", value)
 			}
+
 			flattened[key] = types.String{NullString: sql.NullString{String: val, Valid: true}}
 		}
 	}