Extract valid TS primary key type from Drizzle column?

[m1212e]

Hi, I'm writing a library around drizzle and would like to offer a function accepting a parameter valid for a primary key of a table. This is my approach:

type TablePrimaryKeyColumn = NonNullable<
			DB["_"]["schema"]
		>[ExplicitTableName]["primaryKey"][number];
		type PrimaryKeyType = GetColumnData<TablePrimaryKeyColumn, "raw">;

I use the GetColumnData to try to extract the type but I only get unknown in doing so. This might occur because the primaryKey field is an array? Is there a nice way to do this properly?
Thanks a lot for your work!