一个高效的分页存储过程

存储过程的代码：

CREATE PROCEDURE [dbo].[P_GridViewPager] (     @recordTotal INT OUTPUT,            --输出记录总数     @viewName VARCHAR(800),        --表名     @fieldName VARCHAR(800) = '*',        --查询字段     @keyName VARCHAR(200) = 'Id',            --索引字段     @pageSize INT = 20,                    --每页记录数     @pageNo INT =1,                    --当前页     @orderString VARCHAR(200),        --排序条件     @whereString VARCHAR(800) = '1=1'        --WHERE条件 ) AS BEGIN      DECLARE @beginRow INT      DECLARE @endRow INT      DECLARE @tempLimit VARCHAR(200)      DECLARE @tempCount NVARCHAR(1000)      DECLARE @tempMain VARCHAR(1000)      --declare @timediff datetime             set nocount on      --select @timediff=getdate() --记录时间       SET @beginRow = (@pageNo - 1) * @pageSize    + 1      SET @endRow = @pageNo * @pageSize      SET @tempLimit = 'rows BETWEEN ' + CAST(@beginRow AS VARCHAR) +' AND '+CAST(@endRow AS VARCHAR)            --输出参数为总记录数      SET @tempCount = 'SELECT @recordTotal = COUNT(*) FROM (SELECT '+@keyName+' FROM '+@viewName+' WHERE '+@whereString+') AS my_temp'      EXECUTE sp_executesql @tempCount,N'@recordTotal INT OUTPUT',@recordTotal OUTPUT              --主查询返回结果集      SET @tempMain = 'SELECT * FROM (SELECT ROW_NUMBER() OVER (order by '+@orderString+') AS rows ,'+@fieldName+' FROM '+@viewName+' WHERE '+@whereString+') AS main_temp WHERE '+@tempLimit            --PRINT @tempMain      EXECUTE (@tempMain)      --select datediff(ms,@timediff,getdate()) as 耗时             set nocount off END  GO