Too bad there isn't an alter session command which causes statements with unaliased columns to generate a warning / error. I'd enable that puppy in a heartbeat. On Wed, Oct 16, 2013 at 9:30 AM, Mark W. Farnham <mwf@xxxxxxxx> wrote: > The things that previously worked with an ambiguous column reference were > all bugs of the most insidious kind: For a while they work (possibly even > getting correct results) and then they break when the complier is fixed. > -- //www.freelists.org/webpage/oracle-l