Alias      string
	Conds      []interface{}
	On         *clause.Where
	Selects    []string
	Omits      []string
	Expression clause.Expression
	JoinType   clause.JoinType
}

// StatementModifier statement modifier interface
type StatementModifier interface {
	ModifyStatement(*Statement)
}

// WriteString write string
func (stmt *Statement) WriteString(str string) (int, error) {
	return stmt.SQL.WriteString(str)
}