From: | Seamus Thomas Carroll <carrolls(at)cpsc(dot)ucalgary(dot)ca> |
---|---|
To: | pgsql-interfaces(at)postgresql(dot)org |
Subject: | Help with adding C-Language Functions |
Date: | 2005-02-10 03:02:05 |
Message-ID: | Pine.LNX.4.60.0502091954340.5503@frost |
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Lists: | pgsql-interfaces |
Hi,
I am trying to add a C-Language Function. I have created a small example
in file BlackboardFunctions.c.
#include <postgres.h>
#include <fmgr.h>
PG_FUNCTION_INFO_V1(add_one);
Datum
add_one(PG_FUNCTION_ARGS)
{
int32 arg = PG_GETARG_INT32(0);
PG_RETURN_INT32(arg + 1);
}
The make file:
make:
cc -fpic -c BlackboardFunctions.c -I /home/grads/carrolls/source/postgresql-7.4.5/src/include/
cc -shared -o BlackboardFunctions.so BlackboardFunctions.o
Everything compiles nicely and when i try to add the function using:
Blackboard=# CREATE FUNCTION add_one(integer) RETURNS integer
Blackboard-# AS '/home/grads/carrolls/gradstudies/implementation/BlackboardFunctions/BlackboardFunctions', 'add_one'
Blackboard-# LANGUAGE C STRICT;
I get the following error:
ERROR: could not find function "add_one" in file
"/home/grads/carrolls/gradstudies/implementation/BlackboardFunctions/BlackboardFunctions.so"
A grep of BlackboardFunction.so finds add_one.
I figure i must be doing something obviously wrong but for the life of me
i cant figure out what that might bt. Can anyone recommend a course
of action?
Thank you,
Seamus
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