eehab hamzeh wrote:
Dear all,
I try to compile the code below to dynamic library, the problem if i
declare the variable type to anything else int32, i recieve the error
as below, any body have experience in writing functions using c
i use VC++ 6.
Kind regards
ihab
extern "C" {
Datum add_one(PG_FUNCTION_ARGS) {
float8 arg = PG_GETARG_FLOAT8(0);
float8 arg1 = PG_GETARG_FLOAT8(1);
PG_RETURN_FLOAT8(arg + arg1);
}
Hi ihab,
As a starting point, you're missing the PG_FUNCTION_INFO_V1(add_one)
macro at the start of your code, plus a bunch of #includes. I'd suggest
that you take a look at
http://www.postgresql.org/docs/8.3/interactive/xfunc-c.html, the PostGIS
codebase, and ask further questions on the PostgreSQL mailing lists.
HTH,
Mark.
--
Mark Cave-Ayland - Senior Technical Architect
PostgreSQL - PostGIS
Sirius Corporation plc - control through freedom
http://www.siriusit.co.uk
t: +44 870 608 0063
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