Tom,
At first I was about to tell you that it did not make sense to use local
variable in the order by or group by clauses, but since they (order by -
group by) can take numerical arguments...
I understand perfectly now.
Thanks for the help.
JLL
Tom Lane wrote:
>
> "Nigel J. Andrews" <nandrews@investsystems.co.uk> writes:
> > I'd also say your problem was probably more due to how you are initialising
> > exchangeno and routeno variables to empty strings and then using those values
> > in the order by clause of the select.
>
> Yes, this is surely the issue: the 'exchangeno' and 'routeno' names in
> the ORDER BY clause are being replaced by the plpgsql vars of the same
> names.
>
> It's a bad idea to use plpgsql variable names that are the same as
> column names of tables that you use in the function...
>
> regards, tom lane