if db.Statement != nil && db.Statement.ConnPool != nil {
		connPool = db.Statement.ConnPool
	}
	if tx, ok := connPool.(*sql.Tx); ok && tx != nil {
		return (*sql.DB)(reflect.ValueOf(tx).Elem().FieldByName("db").UnsafePointer()), nil
	}

	if dbConnector, ok := connPool.(GetDBConnector); ok && dbConnector != nil {
		if sqldb, err := dbConnector.GetDBConn(); sqldb != nil || err != nil {
			return sqldb, err
		}
	}

					ef.TagSettings[k] = v
				}
			}
		case reflect.Invalid, reflect.Uintptr, reflect.Array, reflect.Chan, reflect.Func, reflect.Interface,
			reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer, reflect.Complex64, reflect.Complex128:
			schema.err = fmt.Errorf("invalid embedded struct for %s's field %s, should be struct, but got %v", field.Schema.Name, field.Name, field.FieldType)
		}
	}

	return field