[SQLObject] functions and expressions in SQL selects?

[abel d. <ade...@gm...>]

Hi all,

I'm trying to declare an SQLObject derived class, where a column
contains a computed value; the SQL query should look like:

SELECT x, my_function(x) FROM mytable

or

SELECT x, y, y != my_function(x) FROM mytable

Reading the docs, I could not figure out, how a colunm definition
should look for the last column.

Any hints?

TIA
Abel