晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。   林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。   见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝)   既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。   南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。 sh-3ll

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#ifndef SQL_SERVERS_INCLUDED
#define SQL_SERVERS_INCLUDED

/* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1335  USA */

#include "slave.h" // for tables_ok(), rpl_filter

class THD;
typedef struct st_lex_server_options LEX_SERVER_OPTIONS;
typedef struct st_mem_root MEM_ROOT;

/* structs */
typedef struct st_federated_server
{
  const char *server_name;
  long port;
  size_t server_name_length;
  const char *db, *scheme, *username, *password, *socket, *owner, *host, *sport;
} FOREIGN_SERVER;

/* cache handlers */
bool servers_init(bool dont_read_server_table);
bool servers_reload(THD *thd);
void servers_free(bool end=0);

/* insert functions */
int create_server(THD *thd, LEX_SERVER_OPTIONS *server_options);

/* drop functions */ 
int drop_server(THD *thd, LEX_SERVER_OPTIONS *server_options);

/* update functions */
int alter_server(THD *thd, LEX_SERVER_OPTIONS *server_options);

/* lookup functions */
FOREIGN_SERVER *get_server_by_name(MEM_ROOT *mem, const char *server_name,
                                   FOREIGN_SERVER *server_buffer);

#endif /* SQL_SERVERS_INCLUDED */