Am Dienstag, 27. Februar 2007 19:50 schrieb Tom Lane:
> Seems basically we'd want to not cast unknown to anyarray unless there
> is some additional bit of context suggesting that that's the right thing.
> But what should that extra requirement be?  Can we go as far as not
> doing this cast implicitly at all?

We could say that unknown is not taken as anyarray input if the entire 
function/operator argument list consists of anyelement or anyarray.  But that 
might be even harder to comprehend.  With the ARRAY[...] syntax available, 
converting unknown to anyarray might be altogether unnecessary.

Peter Eisentraut

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