Hi, Jacob
I followed your procedure and here are the results:
1. The initial value of the column needs to be set manually in the painter (in case of our application this is always the case, since we do not work with PB catalog tables). So, I set it to 'B' and it was lost after the select change.
2. I close and open the painter before changing the select statement (this way I simulate a change of DW after a long period after it's creation).
Here is the screenshot befroe the sql change
Now I add the 3rd field from the deparmtnet table. I got a warning message
And then the initial value was gone: