Re: SELECT 42 AS a, a AS b FROM system.iota

> I'm wondering if a is a column of system.iota ...
>
> David, does "select a as b from system.iota" work ?
>
> Luc.

Luc, system.iota in ADS is a table with a single row and a single
column, also named "iota".
As expected, "select a as b from system.iota" returns an error message
that column "a" does not exist.

My example is simplified as far as possible for demonstration purposes
but it's not just a theoretical problem - in the real SELECT I have a
longer expression instead of "42" which I would like to avoid
repeating within the expressions for several other columns.

David