SQL2000的系统表sysproperties在SQL2005中 无效的 问题

有两种解决办法

方法一、是我在网上找的：将原来的sysproperties改成sys.extended_properties并且对应关系如下

sys.extended_properties
left join sys.extended_properties g on a.id=g.class and

a.colid=g.minor_id

left join sys.extended_properties f on d.id=f.class and f.minor_id=0

2000的数据库附加不能05的数据库里出了sysproperties不存在

上面就是解决的方法，以后备用。

  【sysproperties】表 原来【SQL2000】中的表【sysproperties】在【SQL2005】中已经不存在了，被是表【extended_properties】取代了。  能不出错吗？

微软公司在升级数据库版本的问题，怎么没有考虑到程序员？

微软删除一个sysproperties表，不知道多少个基于【sysproperties】的程序要出问题。 

 

所以基于上面的解决办法，我找到了

 第二个方法，相对比较简单

建一个视图：

CREATE VIEW sysproperties
AS
 SELECT class AS id,Minor_id AS sMallid,* from sys.extended_properties

这样以前写的代码 在找不到表的情况下就会用这个视图。

暂时貌似可以解决问题

举一个列子如下：修改后一样可以在2005中运行：

 --查询所有用户表所有字段的特征
SELECT D.Name as TableName, A.colorder AS ColOrder, A.name AS Name,  
  COLUMNPROPERTY(A.ID,A.Name, 'IsIdentity') AS IsIdentity,  
  CASE WHEN EXISTS
  (SELECT 1
  FROM dbo.sysobjects
  WHERE Xtype = 'PK' AND Name IN
  (SELECT Name
  FROM sysindexes
  WHERE indid IN
  (SELECT indid
  FROM sysindexkeys
  WHERE ID = A.ID AND colid = A.colid)))  
  THEN 1 ELSE 0 END AS 主键,  
  B.name AS 类型,
  A.length AS [长度],
  A.xprec AS [精度],
  A.xscale AS [小数],
  CASE WHEN A.isnullable = 1 THEN 1 ELSE 0 END AS [可为空],  
ISNULL(E.text, ' ') AS [默认值],  
  ISNULL(G.[value], ' ') AS [说明]
FROM dbo.syscolumns A LEFT OUTER JOIN
  dbo.systypes B ON A.xtype = B.xusertype INNER JOIN
  dbo.sysobjects D ON A.id = D.id AND D.xtype = 'U' AND  
  D.name <> 'dtproperties' LEFT OUTER JOIN
  dbo.syscomments E ON A.cdefault = E.id 
  LEFT OUTER JOIN dbo.sysproperties G ON A.id = G.id AND A.colid = G.smallid
--WHERE D.Name='tablename' --如果找指定表,把注释去掉
ORDER BY 1, 2

上面是 在2000中运行的效果，正确，没问题

下面是利用【sys.extended_properties】的效果，用网上找的方法，可行

--查询所有用户表所有字段的特征
SELECT D.Name as TableName, A.colorder AS ColOrder, A.name AS Name,  
  COLUMNPROPERTY(A.ID,A.Name, 'IsIdentity') AS IsIdentity,  
  CASE WHEN EXISTS
  (SELECT 1
  FROM dbo.sysobjects
  WHERE Xtype = 'PK' AND Name IN
  (SELECT Name
  FROM sysindexes
  WHERE indid IN
  (SELECT indid
  FROM sysindexkeys
  WHERE ID = A.ID AND colid = A.colid)))  
  THEN 1 ELSE 0 END AS 主键,  
  B.name AS 类型,
  A.length AS [长度],
  A.xprec AS [精度],
  A.xscale AS [小数],
  CASE WHEN A.isnullable = 1 THEN 1 ELSE 0 END AS [可为空],  
ISNULL(E.text, ' ') AS [默认值],  
  ISNULL(G.[value], ' ') AS [说明]
FROM dbo.syscolumns A LEFT OUTER JOIN
  dbo.systypes B ON A.xtype = B.xusertype INNER JOIN
  dbo.sysobjects D ON A.id = D.id AND D.xtype = 'U' AND  
  D.name <> 'dtproperties' LEFT OUTER JOIN
  dbo.syscomments E ON A.cdefault = E.id 
left join sys.extended_properties g 
on a.id=g.class and 
a.colid=g.minor_id
left join sys.extended_properties f on d.id=f.class and f.minor_id=0
WHERE D.Name='tablename' --如果找指定表,把注释去掉
ORDER BY 1, 2

 

另外我在 sql2005中建立视图 ：

CREATE VIEW sysproperties
AS
 SELECT class AS id,Minor_id AS sMallid,* from sys.extended_properties

后再执行第一个不经过修改用【sysproperties】的代码也能正常运行。