BlogJava-sealyu-随笔分类-数据库http://www.blogjava.net/sealyu/category/30677.htmlzh-cnTue, 22 Apr 2008 15:43:36 GMTTue, 22 Apr 2008 15:43:36 GMT60SQL Server 2000 错误的解决方法（ Error:The identifier that starts with 'xxxxx' is too long. Maximum length is 128.）http://www.blogjava.net/sealyu/archive/2008/04/22/194909.htmlsealsealTue, 22 Apr 2008 15:36:00 GMThttp://www.blogjava.net/sealyu/archive/2008/04/22/194909.htmlhttp://www.blogjava.net/sealyu/comments/194909.htmlhttp://www.blogjava.net/sealyu/archive/2008/04/22/194909.html#Feedback0http://www.blogjava.net/sealyu/comments/commentRss/194909.htmlhttp://www.blogjava.net/sealyu/services/trackbacks/194909.html UPDATE tables1 SET sql= "select id  from table2 with(nolock)    
inner join table3 request with(nolock) on table3 .id = table2.column1Id   
inner join table4 bundle with(nolock) on table4 .id = table2..column2Id        
where table1.series in('220-602','220-603','220-604','JK0-602','JK0-603',         
                    'JK0-604','N10-003','JK0-012','PK0-002','SY0-101','JK0-010','HT0-201',         
                    '221-602','221-603','221-604','JK1-602','JK1-603','JK1-604','N11-103',         
                    'JK1-012','PK1-002','SY1-101','JK1-010','HT1-201','PD0-001','PD1-001',         
                    'SK0-002','RF0-001')"

报错：The identifier that starts with 'xxxxx' is too long. Maximum length is 128. 此sql字段为varchar(8000), 显然长度并没有超出8000. Google了一下，发现并不是字段长度的问题，原来是引号上面出了问题。
解决方法：用两个单引号将要更新的值括起来，值中有引号的地方全部替换为两个双引号，修改后的sql为：
UPDATE tables1 SET sql= 'select id  from table2 with(nolock)    
inner join table3 request with(nolock) on table3 .id = table2.column1Id   
inner join table4 bundle with(nolock) on table4 .id = table2..column2Id        
where table1.series in(""220-602"",""220-603"",""220-604"",""JK0-602"",""JK0-603"",         
                    ""JK0-604"",""N10-003"",""JK0-012"",""PK0-002"",""SY0-101"",""JK0-010"",""HT0-201"",         
                    ""221-602"",""221-603"",""221-604"",""JK1-602"",""JK1-603"",""JK1-604"",""N11-103"",         
                    ""JK1-012"",""PK1-002"",""SY1-101"",""JK1-010"",""HT1-201"",""PD0-001"",""PD1-001"",         
                    ""SK0-002"",""RF0-001"")'

执行后解决问题。




seal 2008-04-22 23:36 发表评论
]]>sql server 中删除默认约束的通用sql脚本http://www.blogjava.net/sealyu/archive/2008/04/17/193755.htmlsealsealThu, 17 Apr 2008 06:31:00 GMThttp://www.blogjava.net/sealyu/archive/2008/04/17/193755.htmlhttp://www.blogjava.net/sealyu/comments/193755.htmlhttp://www.blogjava.net/sealyu/archive/2008/04/17/193755.html#Feedback0http://www.blogjava.net/sealyu/comments/commentRss/193755.htmlhttp://www.blogjava.net/sealyu/services/trackbacks/193755.html 如果想删除这个设置了默认值的字段（假设此字段名column1），
执行“ALTER TABLE table1 DROP COLUMN column1”时就会报错：
The object 'DF__xxxxxxxxxxx' is dependent on column 'column1'.
ALTER TABLE DROP COLUMN column1failed because one or more objects access this column.

所以在删除此字段时需要先将系统表中的对应默认约束删除， 可以使用下面的脚本进行删除：
-- this script drops the default constraint which is generated by the setting of default value.
DECLARE @tablename VARCHAR(100), @columnname VARCHAR(100), @tab VARCHAR(100)
SET @tablename='CountryGroupEmailAndWaitAux'
SET @columnname='actionOfHasNoValidEmail'

declare @defname varchar(100)
declare @cmd varchar(100)

select @defname = name
FROM sysobjects so
JOIN sysconstraints sc
ON so.id = sc.constid
WHERE object_name(so.parent_obj) = @tablename
AND so.xtype = 'D'
AND sc.colid =
(SELECT colid FROM syscolumns
WHERE id = object_id(@tablename) AND
name = @columnname)

select @cmd='alter table '+ @tablename+ ' drop constraint '+ @defname
if @cmd is null print 'No default constraint to drop'
exec (@cmd)

在删除对应的默认约束后，执行：
ALTER TABLE table1 DROP COLUMN column1
即可删除字段。


seal 2008-04-17 14:31 发表评论
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