int reload_address_db_table(address_tables_group_t *atg)
{
	db_key_t cols[5];
	db1_res_t* res = NULL;
	db_row_t* row;
	db_val_t* val;

	int i;
	unsigned int gid;
	unsigned int port;
	unsigned int mask;
	str ips;
	str tagv;

	cols[0] = &perm_grp_col;
	cols[1] = &perm_ip_addr_col;
	cols[2] = &perm_mask_col;
	cols[3] = &perm_port_col;
	cols[4] = &perm_tag_col;

	if (perm_dbf.use_table(perm_db_handle, &perm_address_table) < 0) {
		LM_ERR("failed to use table\n");
		return -1;
	}

	if (perm_dbf.query(perm_db_handle, NULL, 0, NULL, cols, 0, 5, 0, &res) < 0) {
		LM_ERR("failed to query database\n");
		return -1;
	}

	row = RES_ROWS(res);

	LM_DBG("Number of rows in address table: %d\n", RES_ROW_N(res));

	for (i = 0; i < RES_ROW_N(res); i++) {
		val = ROW_VALUES(row + i);
		/* basic checks to db values */
		if (ROW_N(row + i) != 5)
		{
			LM_DBG("failure during checks of db address table: Columns %d - expected 5\n", ROW_N(row + i));
			goto dberror;
		}
		if ((VAL_TYPE(val) != DB1_INT) || VAL_NULL(val) || (VAL_INT(val) <= 0))
		{
			LM_DBG("failure during checks of database value 1 (group) in address table\n");
			goto dberror;
		}
		if ((VAL_TYPE(val + 1) != DB1_STRING) && (VAL_TYPE(val + 1) != DB1_STR))
		{
			LM_DBG("failure during checks of database value 2 (IP address) in address table - not a string value\n");
			goto dberror;
		}
		if (VAL_NULL(val + 1))
		{
			LM_DBG("failure during checks of database value 2 (IP address) in address table - NULL value not permitted\n");
			goto dberror;
		}
		if ((VAL_TYPE(val + 2) != DB1_INT) || VAL_NULL(val + 2))
		{
			LM_DBG("failure during checks of database value 3 (subnet size/CIDR) in address table\n");
			goto dberror;
		}
		if ((VAL_TYPE(val + 3) != DB1_INT) || VAL_NULL(val + 3))
		{
			LM_DBG("failure during checks of database value 4 (port) in address table\n");
			goto dberror;
		}
		gid = VAL_UINT(val);
		ips.s = (char *)VAL_STRING(val + 1);
		ips.len = strlen(ips.s);
		mask = VAL_UINT(val + 2);
		port = VAL_UINT(val + 3);
		tagv.s = VAL_NULL(val + 4)?NULL:(char *)VAL_STRING(val + 4);
		if(tagv.s!=NULL) {
			tagv.len = strlen(tagv.s);
		}
		if(reload_address_insert(atg, gid, &ips, mask, port, &tagv)<0) {
			goto dberror;
		}
	}

	perm_dbf.free_result(perm_db_handle, res);

	return 1;

dberror:
	LM_ERR("database problem - invalid record\n");
	perm_dbf.free_result(perm_db_handle, res);
	return -1;
}