Re: C-language stored function and float4 type

whiplash <whiplash@bss.org.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