pltestlang.c

#include "postgres.h"
#include "executor/spi.h"
#include "commands/trigger.h"
#include "fmgr.h"
#include "access/heapam.h"
#include "utils/syscache.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_type.h"

PG_MODULE_MAGIC;

Datum pltestlang_call_handler(PG_FUNCTION_ARGS);

PG_FUNCTION_INFO_V1(pltestlang_call_handler);

Datum
pltestlang_call_handler(PG_FUNCTION_ARGS)
{

    int32 arg1 = PG_GETARG_INT32(0);
    int32 arg2 = PG_GETARG_INT32(1);

    PG_RETURN_INT32(arg1+arg2);
}