On Jun26, 2011, at 00:29 , Jeff Davis wrote: > declare the return type of a function, and then use the declared type to > infer the argument types. That would be nice because you would just have > to do: > range(1,10)::int8range > However, that's kind of backwards from how our type inference system > works now, and sounds like a big change.
Well, there actually *is* some precedence for that kind of top-down (form a syntactic perspective) type inference. We *enforce* the cast in array[]::<arraytype> and actually for a very similar reason - without the case, there's no way of knowing which type of empty array was meant. I think we also special-case 'literal'::<type> to use the input function of type directly, instead of first creating a text value and later casting it to <type>. best regards, Florian Pflug -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
