All you need is a "max" function with two arguments. To find the
max of four numbers you can do this
max(max(max(a,b),c),d)
It is not even all that ugly.
Tom Lane wrote:
>
> "=?iso-8859-1?Q?Paul_Wehr?=" <postgresql@industrialsoftworks.com> writes:
> > Since you didn't volunteer "just use not_aggregate_max()", I'm assuming
> > there's no built-in thing, so the follow-up question(s) would be:
> > 1) can a function be defined with a variable number of arguments
>
> No, although sometimes you can fake it by defining a family of functions
> with the same name and different numbers of arguments.
>
> > 2) can a function be created that calls itself (i.e. recursive)
>
> Sure, although I don't see how that helps in this case.
>
> > 3) can you do it for me? :)
>
> Nope, got too many things to do already...
>
> regards, tom lane
>
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Chris Albertson
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