Hi Vitalii, this sounds promising, can you send me that?
Best Regards, Uwe 2011/4/25 Віталій Тимчишин <tiv...@gmail.com> > > > 2011/4/23 Robert Haas <robertmh...@gmail.com> > >> On Apr 18, 2011, at 1:13 PM, Uwe Bartels <uwe.bart...@gmail.com> wrote: >> > Hi Robert, >> > >> > thanks for your answer. >> > the aggregate function I was talking about is the function I need to use >> for the non-group by columns like min() in my example. >> > There are of course several function to choose from, and I wanted to >> know which causes as less as possible resources. >> >> Oh, I see. min() is probably as good as anything. You could also create a >> custom aggregate that just always returns its first input. I've occasionally >> wished we had such a thing as a built-in. >> >> > I've once done "single" grouping function - it checks that all it's input > values are equal (non-null ones) and returns the value or raises an error if > there are two different values. > > Best regards, Vitalii Tymchyshyn > > > > -- > Best regards, > Vitalii Tymchyshyn >
