mybatis注解sql判断是否为空

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@Options(useGeneratedKeys=true,keyProperty = "id",keyColumn = "id")
    @Update("<script> update "+Gather.TABLE_NAME+" set status = #{status} <if test='remark!=null'> , remark = #{remark} </if> where id = #{id} </script>")
    int updateStatus(@Param("id")Integer id, @Param("status")Integer status,@Param("remark")String remark);

@Param("id")别名，对应sql中的#{id}