Is there a way to rename a column in an expression?

[charlieholtz72]

For example, let's say within an expression I want to calculate MV as price * num_shares. Is there a way to add that column but renamed as MV?

Ideally I'd like to do something like this: 'price' * 'num_shares' as 'MV'

[dhirschfeld]

The new way is to use a comment to denote the column name: #1493 (comment)