While practicing an example for Derived Column Transformation on link
I configured Derived Column name Gender to replace the Gender column with expression
Gender == "M" ? "Male" : "Female"
As we can see the input length for gender column is 1 but I am converting the column and increasing the length to max of 6. I found that the length can be changed from advanced editor otherwise if I don't change length I get truncation error.
I configured the derived column as following
Now in advanced editor I see the following screen
As you can see the Gender column does not show up in Output columns and the length is also graded out and can not be changed.
Please let me know how I can get the Gender column to show up in Output Derived Column and how to change the length.