Function lo_create

src/interfaces/libpq/fe-lobj.c:479–514

* lo_create * create a new large object * if lobjId isn't InvalidOid, it specifies the OID to (attempt to) create * * returns the oid of the large object created or * InvalidOid upon failure */

 * InvalidOid upon failure
 */
Oid
lo_create(PGconn *conn, Oid lobjId)
{
	PQArgBlock	argv[1];
	PGresult   *res;
	int			retval;
	int			result_len;

	if (lo_initialize(conn) < 0)
		return InvalidOid;

	/* Must check this on-the-fly because it's not there pre-8.1 */
	if (conn->lobjfuncs->fn_lo_create == 0)
	{
		appendPQExpBuffer(&conn->errorMessage,
						  libpq_gettext("cannot determine OID of function %s\n"),
						  "lo_create");
		return InvalidOid;
	}

	argv[0].isint = 1;
	argv[0].len = 4;
	argv[0].u.integer = lobjId;
	res = PQfn(conn, conn->lobjfuncs->fn_lo_create,
			   &retval, &result_len, 1, argv, 1);
	if (PQresultStatus(res) == PGRES_COMMAND_OK)
	{
		PQclear(res);
		return (Oid) retval;
	}
	else
	{
		PQclear(res);
		return InvalidOid;
	}
}


/*