邹健的分页存储过程怎么返回RowsCount?

[godhuang]

declare @row int
exec up_show 'select * from t_menus',10,1,'','menuid',@row out
select @row
怎么我这样写取出来的@row是null呢?应该怎么取?


/*--用存储过程实现的分页程序

显示指定表、视图、查询结果的第X页
对于表中主键或标识列的情况,直接从原表取数查询，其它情况使用临时表的方法
如果视图或查询结果中有主键,不推荐此方法

--邹建 2003.09(引用请保留此信息)--*/

/*--调用示例
exec p_show '地区资料'

exec p_show '地区资料',5,3,'地区编号,地区名称,助记码','地区编号'
--*/
CREATE Proc UP_Show
@QueryStr nvarchar(4000), --表名、视图名、查询语句
@PageSize int=10, --每页的大小(行数)
@PageCurrent int=1, --要显示的页
@FdShow nvarchar (4000)='', --要显示的字段列表,如果查询结果有标识字段,需要指定此值,且不包含标识字段
@FdOrder nvarchar (1000)='', --排序字段列表
@Rows int = null OUTPUT -- 输出记录数, 如果@rows为null, 则输出记录数, 否则不要输出
as
set nocount on
declare @FdName nvarchar(250) --表中的主键或表、临时表中的标识列名
,@Id1 varchar(20),@Id2 varchar(20) --开始和结束的记录号
,@Obj_ID int --对象ID
--表中有复合主键的处理
declare @strfd nvarchar(2000) --复合主键列表
,@strjoin nvarchar(4000) --连接字段
,@strwhere nvarchar(2000) --查询条件


select @Obj_ID=object_id(@QueryStr)
,@FdShow=case isnull(@FdShow,'') when '' then ' *' else ' '+@FdShow end
,@FdOrder=case isnull(@FdOrder,'') when '' then '' else ' order by '+@FdOrder end
,@QueryStr=case when @Obj_ID is not null then ' '+@QueryStr else ' ('+@QueryStr+') a' end

--如果显示第一页，可以直接用top来完成
if @PageCurrent=1
begin
select @Id1=cast(@PageSize as varchar(20))
exec('select top '+@Id1+@FdShow+' from '+@QueryStr+@FdOrder)
return
end

--如果是表,则检查表中是否有标识更或主键
if @Obj_ID is not null and objectproperty(@Obj_ID,'IsTable')=1
begin
select @Id1=cast(@PageSize as varchar(20))
,@Id2=cast((@PageCurrent-1)*@PageSize as varchar(20))

select @FdName=name from syscolumns where id=@Obj_ID and status=0x80
if @@rowcount=0 --如果表中无标识列,则检查表中是否有主键
begin
if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype='PK')
goto lbusetemp --如果表中无主键,则用临时表处理

select @FdName=name from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
if @@rowcount>1 --检查表中的主键是否为复合主键
begin
select @strfd='',@strjoin='',@strwhere=''
select @strfd=@strfd+',['+name+']'
,@strjoin=@strjoin+' and a.['+name+']=b.['+name+']'
,@strwhere=@strwhere+' and b.['+name+'] is null'
from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
select @strfd=substring(@strfd,2,2000)
,@strjoin=substring(@strjoin,5,4000)
,@strwhere=substring(@strwhere,5,4000)
goto lbusepk
end
end
end
else
goto lbusetemp

/*--使用标识列或主键为单一字段的处理方法--*/
lbuseidentity:
if @Rows is null
begin
declare @lbuseidentity nvarchar(1000)
set @lbuseidentity = 'select @rows = count(*) from '+@QueryStr
exec sp_executesql @lbuseidentity, N'@Rows int out', @Rows out
end
exec('select top '+@Id1+@FdShow+' from '+@QueryStr
+' where '+@FdName+' not in(select top '
+@Id2+' '+@FdName+' from '+@QueryStr+@FdOrder
+')'+@FdOrder
)
return

/*--表中有复合主键的处理方法--*/
lbusepk:
if @Rows is null
begin
declare @lbusepk nvarchar(1000)
set @lbusepk = 'select @rows = count(*) from '+@QueryStr
exec sp_executesql @lbusepk, N'@Rows int out', @Rows out
end

exec('select '+@FdShow+' from(select top '+@Id1+' a.* from
(select top 100 percent * from '+@QueryStr+@FdOrder+') a
left join (select top '+@Id2+' '+@strfd+'
from '+@QueryStr+@FdOrder+') b on '+@strjoin+'
where '+@strwhere+') a'
)
return

/*--用临时表处理的方法--*/
lbusetemp:
select @FdName='[ID_'+cast(newid() as varchar(40))+']'
,@Id1=cast(@PageSize*(@PageCurrent-1) as varchar(20))
,@Id2=cast(@PageSize*@PageCurrent-1 as varchar(20))

declare @lbusetemp nvarchar(4000)
set @lbusetemp = 'select '+@FdName+'=identity(int,0,1),'+@FdShow+'
into #tb from'+@QueryStr+@FdOrder
+case when @Rows is null then ' set @Rows = @@rowcount ' else '' end + '
select '+@FdShow+' from #tb where '+@FdName+' between '
+@Id1+' and '+@Id2
exec sp_executesql @lbusetemp, N'@Rows int out', @Rows out
GO

[godhuang]

up

[godhuang]

declare @row int
exec up_show 'select * from t_menus',10,1,'','',@row out

exec up_show 'select * from t_menus',10,2,'','',@row out

select @row

我调用的时候为什么出现无法使用 SELECT INTO 语句向表 '#tb' 中添加标识列，该表中已有继承了标识属性的列 'MenuID'。的错误提示啊

[polley0927]

ding