diff --git a/sql/relationdb_n.sql b/sql/relationdb_n.sql
index 36a3531..3e4b813 100644
--- a/sql/relationdb_n.sql
+++ b/sql/relationdb_n.sql
@@ -92,7 +92,8 @@ CREATE TABLE `guild` (
   `gameid` int(11) NOT NULL DEFAULT '0' COMMENT 'gameid',
   `channel` int(11) NOT NULL DEFAULT '0' COMMENT 'channel',
   `guild_id` bigint NOT NULL COMMENT '公会id',
-  `guild_name` varchar(128) CHARACTER SET utf8mb4 NOT NULL COMMENT 'guild';
+  `guild_name` tinyblob COMMENT 'guild_name base64',
+  `guild_name_base64` varchar(128) CHARACTER SET utf8 NOT NULL DEFAULT '' COMMENT 'guild_name base64';
   `guild_lv` int(11) NOT NULL DEFAULT '0' COMMENT '公会等级',
   `guild_exp` double NOT NULL DEFAULT '0' COMMENT '公会经验',
   `guild_badge` int(11) NOT NULL DEFAULT '0' COMMENT '公会徽章',
@@ -119,7 +120,7 @@ CREATE TABLE `guild` (
   `modifytime` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
   PRIMARY KEY (`idx`),
   UNIQUE KEY `guild_id` (`guild_id`),
-  UNIQUE KEY `guild_name` (`gameid`, `name_ext1`, `name_ext2`, `guild_name`),
+  UNIQUE KEY `guild_name` (`gameid`, `name_ext1`, `name_ext2`, `guild_name_base64`),
   KEY `owner_id` (`owner_id`),
   KEY `creator_id` (`creator_id`),
   KEY `modifytime` (`modifytime`)