TC代码分析--好友，门派系统

1、好友关系设计：

CREATE TABLE `character_social` (
  `guid` int(10) unsigned NOT NULL DEFAULT '0' COMMENT 'Character Global Unique Identifier',
  `friend` int(10) unsigned NOT NULL DEFAULT '0' COMMENT 'Friend Global Unique Identifier',
  `flags` tinyint(3) unsigned NOT NULL DEFAULT '0' COMMENT 'Friend Flags',
  `note` varchar(48) NOT NULL DEFAULT '' COMMENT 'Friend Note',
  PRIMARY KEY (`guid`,`friend`,`flags`),
  KEY `friend` (`friend`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='Player System';

2、门派关系设计：

门派信息：
CREATE TABLE `guild` (
  `guildid` int(10) unsigned NOT NULL DEFAULT '0',
  `name` varchar(24) NOT NULL DEFAULT '',
  `leaderguid` int(10) unsigned NOT NULL DEFAULT '0',
  `EmblemStyle` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `EmblemColor` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `BorderStyle` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `BorderColor` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `BackgroundColor` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `info` varchar(500) NOT NULL DEFAULT '',
  `motd` varchar(128) NOT NULL DEFAULT '',
  `createdate` int(10) unsigned NOT NULL DEFAULT '0',
  `BankMoney` bigint(20) unsigned NOT NULL DEFAULT '0',
  PRIMARY KEY (`guildid`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='Guild System';

门派成员：
CREATE TABLE `guild_member` (
  `guildid` int(10) unsigned NOT NULL COMMENT 'Guild Identificator',
  `guid` int(10) unsigned NOT NULL,　　　　---玩家id
  `rank` tinyint(3) unsigned NOT NULL,
  `pnote` varchar(31) NOT NULL DEFAULT '',
  `offnote` varchar(31) NOT NULL DEFAULT '',
  UNIQUE KEY `guid_key` (`guid`),
  KEY `guildid_key` (`guildid`),
  KEY `guildid_rank_key` (`guildid`,`rank`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='Guild System';

3、建立合适的sql，目的是为了增删改查，分析如下：

1）玩家的guid来自characters，扩展好友设计时，自然使用guid作为关联，欲描述玩家A和玩家B的关系，可能有多种情况，所以加个flag，那么如何增删改查呢？

增加好友关系：
INSERT INTO character_social (guid, friend, flags) VALUES (?, ?, ?)

删除：
DELETE FROM character_social WHERE guid = ? AND friend = ?

取玩家的好友列表：
SELECT friend, flags, note FROM character_social JOIN characters ON characters.guid = character_social.friend WHERE character_social.guid = ? AND deleteinfos_name IS NULL LIMIT 255

更新好友关系：
UPDATE character_social SET flags = ? WHERE guid = ? AND friend = ?

2）每个门派都有一个唯一id，每个门派里有若干成员，每个成员的guid唯一，所以下面这两句的用意于此吧：

UNIQUE KEY `guid_key` (`guid`),---玩家
KEY `guildid_key` (`guildid`),---门派id