r34的mysql错误

#1064 - You have an error in your SQL syntax; check the manual thatcorresponds to your MySQL server version for the right syntax to usenear ''cdb_savepoint' (
  'svp_id' int(10) unsigned NOT NULL auto_increment,
  'svp_' at line 1

看不出什么原因，请解释下谢谢。

ALTER TABLE `cdb_forums` ADD `board_name` char( 50 ) NOT NULL ;

MySQL 返回：文档
#1060 - Duplicate column name 'board_name'

一句都执行不下去。不知何解

错误

SQL 查询:

ALTER TABLE 'cdb_forums' ADD 'board_name'char( 50 ) NOT NULL

MySQL 返回：文档
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''cdb_forums' ADD 'board_name' char(50) NOT NULL' at line 1

#1060 - Duplicate column name 'board_name'
这个是已经升级过了，这些语句（包括另外几个错误）是否以前有升级过？