zh->isam = NULL;
zh->isamc = NULL;
if (!res_get_match (zh->res, "isam", "i", NULL))
{
if (!(zh->isamc = isc_open (zh->bfs, FNAME_ISAMC,
0, key_isamc_m(zh->res))))
zh->isam = NULL;
zh->isamc = NULL;
if (!res_get_match (zh->res, "isam", "i", NULL))
{
if (!(zh->isamc = isc_open (zh->bfs, FNAME_ISAMC,
0, key_isamc_m(zh->res))))