高效的分页存储过程

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