"David G. Johnston" <david.g.johnston@xxxxxxxxx> writes: > I'll agree that the description could discuss the case explicitly, and the > array||scalar case could be added to the examples. Yeah, the documentation completely fails to explain what happens when the inputs aren't two arrays or two objects. I'd kind of assumed that that's an error, but it isn't. Some experimentation indicates that the behavior in all cases except two objects is to convert any non-array input to a one-element array, reducing the situation to the two-array case. regards, tom lane
