Sorry, I created an overloaded function and forgot about it.
> whiplash <whiplash(at)bss(dot)org(dot)ua> writes:
>> Hello! I have C-language stored function like this:
>> CREATE FUNCTION testfunc ( x real, y real )
>> RETURNS real AS
>> 'testfunc'
>> LANGUAGE C STRICT;
>> If i use this function (SELECT testfunc ( 0.1, 0.2 )) I get result with
>> type "double precision".
> What's your basis for asserting that? The function is clearly defined
> to return float4.
>
> regards, tom lane
>