There really is no such thing as a big no no if you know what you are doing.

I disagree with your suggestion. When you select a table from the list your SQL is retained. When you switch back to an SQL Statement your SQL is still there. When you recreate the columns, you have refreshed the metadata in 4 clicks with no hassles.

Select * is not a no no if you want all columns in all rows. This post is about refreshing metadata. Select the table if you want the whole thing. Sometimes that is the case.