> Having reviewed the thread, I'm with Andres and Tom. Maybe though we > should have a note somewhere to the effect that you can't use VARIADIC > with these.
Perhaps such a note belongs hoisted into the functions-conditional section of the manual, making a general observation that these things are conditional *expressions* that may resemble functions, but in particular, COALESCE, GREATEST, and LEAST cannot be called with keyword VARIADIC and an array argument, as they could if they were ordinary functions.
