How can I retrieve a function result?

Hi pgsql community,

 

I'm using libpq C. I'm trying to execute a FUNCTION called "myFunction",

 

*********************************************************************************************************

PGResult *res;

res = PQexecParams ( conn, "select myFunction($1,$2,$3)" , 3, NULL, paramValues, paraLenghts, paramFormats, resultFormat);

 

if ( PQresultStatus (res) != PGRES_TUPLES_OK)

{

//error

}else{

//ok

}

 

*********************************************************************************************************

 

It's works fine, however I dont know how can I retrieve the result that return the FUNCTION "myFunction". "myFunction" is a postgres FUNCTION which returns a INT.

 

Any advices??

 

thanks in advance.

 

Luis.

--
paz, amor y comprensión
        (1967-1994)