存储过程中执行带输出参数的动态"SQL"

CREATE procedure pUserList
(
    @UserType char(2),
    @pagenum int,
    @pERPagesize int,
    @pagetotal int out,
    @rowcount int out
)
as
    set nocount on 

    DECLARE @Err INT,@ErrCounter INT
    declare @sql nvarchar(2000) --声明动态sql执行语句 
    declare @pagecount int --当前页数 
    declare @sWhere nvarchar(200)
    declare @sOrder nvarchar(100)

    set @sWhere = ' where 1=1 '
    if not(@UserType is null)
    set @sWhere = @sWhere + ' and UserType = ' + @UserType
    set @sOrder = ' order by UserID '

--取得当前数据库的记录总数 
declare @row_num int 

LockTimeOutRetry:

--创建临时表，作为数据过滤 
create table #change (T_id int) 


set @sql = 'select @row_num=count(*) from dbo.[User]' + @sWhere
exec sp_executesql @sql,N'@row_num int output', @row_num output

if @row_num % @perpagesize =0 
set @pagetotal = @row_num/@perpagesize
else
set @pagetotal = @row_num/@perpagesize + 1

set @rowcount = @row_num

if @row_num > @perpagesize
begin
set @row_num = @pagenum * @perpagesize 

if @row_num = @perpagesize 
begin
set @sql = N'select top ' + cast(@perpagesize as varchar) + ' 

UserID,LoginName,RealName from dbo.[User]' + @sWhere + @sOrder

exec sp_executesql @sql 

SET @Err = @@ERROR
IF @Err <> 0 GOTO ErrorHandler 
return 0
end
else
begin 
set @row_num = (@pagenum-1) * @perpagesize 

set @pagecount = @row_num 

set @sql=N'insert #change (T_id) select top ' + cast(@pagecount as varchar)

+ ' UserID from dbo.[User] '+@sWhere+' and UserID 
not in (select T_id from #change)' + @sOrder 
exec sp_executesql @sql 
set @sql = N'select top ' + cast(@perpagesize as varchar) + ' 

UserID,LoginName,RealName from dbo.[User] '+@sWhere+' 

and UserID not in (select T_id from #change)' + @sOrder 
exec sp_executesql @sql

SET @Err = @@ERROR
IF @Err <> 0 GOTO ErrorHandler 

return 0

end
end
else
begin
set @sql = 'select UserID,LoginName,RealName
from dbo.[User]' + @sWhere + @sOrder
exec sp_executesql @sql
SET @Err = @@ERROR
IF @Err <> 0 GOTO ErrorHandler 
return 0
end 
ErrorHandler:
IF (@Err = 1222 OR @Err = 1205) AND @ErrCounter = 5
BEGIN 
RAISERROR ('Unable to Lock Data after five attempts.', 16,1) 
return -100
END
IF @Err = 1222 OR @Err = 1205 -- Lock Timeout / Deadlock
BEGIN
WAITFOR DELAY '00:00:00.25'
SET @ErrCounter = @ErrCounter + 1
GOTO LockTimeOutRetry
END
-- else unknown error
RAISERROR (@err, 16,1) WITH LOG
return -100

GO
SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO