defaultStmt := &gorm.Statement{Vars: []interface{}{field.DefaultValueInterface}}
			m.Dialector.BindVarTo(defaultStmt, defaultStmt, field.DefaultValueInterface)
			expr.SQL += " DEFAULT " + m.Dialector.Explain(defaultStmt.SQL.String(), field.DefaultValueInterface)
		} else if field.DefaultValue != "(-)" {
			expr.SQL += " DEFAULT " + field.DefaultValue
		}
	}

	return
}

func (ageFloat) String() string {
	return "age"
}

func TestExplainSQL(t *testing.T) {
	user := *GetUser("explain-sql", Config{})
	dryRunDB := DB.Session(&gorm.Session{DryRun: true})

	stmt := dryRunDB.Model(&user).Where("id = ?", 1).Updates(map[string]interface{}{"age": ageInt(8)}).Statement
	sql := DB.Dialector.Explain(stmt.SQL.String(), stmt.Vars...)
	if !regexp.MustCompile(`.*age.*=8,`).MatchString(sql) {

//				.First(&User{})
//	})
func (db *DB) ToSQL(queryFn func(tx *DB) *DB) string {
	tx := queryFn(db.Session(&Session{DryRun: true, SkipDefaultTransaction: true}))
	stmt := tx.Statement

	return db.Dialector.Explain(stmt.SQL.String(), stmt.Vars...)