为什么保存1个字符时数据存储区在属性上使用文本类型

I have the following:

type Foo struct {
   BarX string
   BarY string
}

When setting BarX = x and BarY = y, the Datastore Viewer is showing BarX as being Text and BarY as being String. I would expect both to be String due to the length of the data.

I can't find any documentation on how to change this anywhere?