Can we use expressions in listcolumns?

[Guido1982]

Lets say I want to alter the columns for the Assets related list under products. I want to show not only the customer, but also the customer city and postal code. Could I use an expression in the field directive of the listcolumns business map?

[joebordes]

I'd say you can't because, if I remember correctly, the business map just uses the column name you give it, the query has to have the field, so, if it works it would be just putting the field name and hoping that the internal query extracts that field.