不幸的是，这是不可能的. 手册本身没有希望的余地:

Unfortunately this is not possible. The manual itself leaves no room for hope:

每个枚举值都有一个索引:

Each enumeration value has an index:

•列中允许的元素列表中的值 规范从1开始编号.

• Values from the list of permissible elements in the column specification are numbered beginning with 1.

鉴于您对此无能为力，我不得不问:为什么要将它设为enum?我还没有遇到这样的情况:enum提供了 any ，这给那些通过眼睛查看查询结果的程序员带来了极大的便利.您希望获得什么好处?我不是专家，但是恕我直言，无论您想要实现什么，除了使用enum之外，还有另一种(更好的)方法.

Seeing as there's nothing you can do about that, I have to ask: why do you need to make this an enum? I have yet to come across a situation where an enum provided any benefit apart convenience to programmers who look at query results by eye. What is the benefit you are looking to gain? I am no guru, but IMHO no matter what you want to achieve there is another (better) way than using an enum.