From my experience, it *** is *** impossible. I would be glad if somebody
told me different, but to my understanding the doc is wrong here.
Andreas
>> Currently only 'null' and 'single value'. The executor
>> doesn't accept anything else for non-sql language functions.
>> PL functions are treated by the executor like 'C' functions.
>
>Actually what I understood from the docs was thatit is 'terribly complicated' and 'beyond the
>scope of this tutorial', but not impossible ;)