高效存储过程分页

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

ALTER PROCEDURE [dbo].[db_article_GetArticlePagination]
( 
@pagesize int,
 @pageindex int,
@classid int,
@sp_keyes varchar(200),
@isSmallClass bit
)
AS
	SET NOCOUNT ON;
declare @filter varchar(4000)
declare @tb varchar(50)
declare @id varchar(50)
set @tb=‘db_article‘
set @id=‘a_id ‘
if(@classid is null)set @classid=0
if(@sp_keyes<>‘‘)set @sp_keyes= ‘ and (sp_keyes LIKE ‘‘%‘ + @sp_keyes + ‘%‘‘)‘
else set @sp_keyes=‘‘
if(@isSmallClass=0)
set @filter=‘a_hidden=1  and  ( ‘+cast(@classid as varchar(20))+‘=0 OR classid= ‘+cast(@classid as varchar(20))+‘ or classid IN   (SELECT classid  FROM db_sys_class  WHERE nsort = ‘‘article‘‘ AND c_class = ‘+cast(@classid as varchar(20))+‘)) ‘ +@sp_keyes
else
set @filter=‘a_hidden=1  and  ( ‘+cast(@classid as varchar(20))+‘=0 OR classid  = ‘+cast(@classid as varchar(20))+‘)‘+@sp_keyes
--print @filter
exec sp_Pagination @tb,@id,‘a_id desc‘,@pageindex,@pagesize,‘a_id,classid,  username, a_topic, a_author, a_comto, a_pic, a_summary, a_counter,  a_tim, a_arrtim‘,@filter,null

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go

ALTER    PROCEDURE [dbo].[sp_Pagination]
(
@Tables varchar(1000),
@PrimaryKey varchar(100),
@Sort varchar(200) = NULL,
@CurrentPage int = 1,
@PageSize int = 10,
@Fields varchar(1000) = ‘*‘,
@Filter varchar(1000) = NULL,
@Group varchar(1000) = NULL
)
AS
/*默认排序*/
IF @Sort IS NULL OR @Sort = ‘‘
SET @Sort = @PrimaryKey
DECLARE @SortTable varchar(100)
DECLARE @SortName varchar(100)
DECLARE @strSortColumn varchar(200)
DECLARE @operator char(2)
DECLARE @type varchar(100)
DECLARE @prec int
/*设定排序语句.*/
IF CHARINDEX(‘DESC‘,@Sort)>0
BEGIN
SET @strSortColumn = REPLACE(@Sort, ‘DESC‘, ‘‘)
SET @operator = ‘<=‘
END
ELSE
BEGIN
IF CHARINDEX(‘ASC‘, @Sort) = 0
SET @strSortColumn = REPLACE(@Sort, ‘ASC‘, ‘‘)
SET @operator = ‘>=‘
END
IF CHARINDEX(‘.‘, @strSortColumn) > 0
BEGIN
SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX(‘.‘,@strSortColumn))
SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX(‘.‘,@strSortColumn) + 1, LEN(@strSortColumn))
END
ELSE
BEGIN
SET @SortTable = @Tables
SET @SortName = @strSortColumn
END
SELECT @type=t.name, @prec=c.prec
FROM sysobjects o 
JOIN syscolumns c on o.id=c.id
JOIN systypes t on c.xusertype=t.xusertype
WHERE o.name = @SortTable AND c.name = @SortName
IF CHARINDEX(‘char‘, @type) > 0
SET @type = @type + ‘(‘ + CAST(@prec AS varchar) + ‘)‘
DECLARE @strPageSize varchar(50)
DECLARE @strStartRow varchar(50)
DECLARE @strFilter varchar(1000)
DECLARE @strSimpleFilter varchar(1000)
DECLARE @strGroup varchar(1000)
/*默认当前页*/
IF @CurrentPage < 1
SET @CurrentPage = 1
/*设置分页参数.*/
SET @strPageSize = CAST(@PageSize AS varchar(50))
SET @strStartRow = CAST(((@CurrentPage - 1)*@PageSize + 1) AS varchar(50))
/*筛选以及分组语句.*/
IF @Filter IS NOT NULL AND @Filter != ‘‘
BEGIN
SET @strFilter = ‘ WHERE ‘ + @Filter + ‘ ‘
SET @strSimpleFilter = ‘ AND ‘ + @Filter + ‘ ‘
END
ELSE
BEGIN
SET @strSimpleFilter = ‘‘
SET @strFilter = ‘‘
END
IF @Group IS NOT NULL AND @Group != ‘‘
SET @strGroup = ‘ GROUP BY ‘ + @Group + ‘ ‘
ELSE
SET @strGroup = ‘‘
/*执行查询语句*/
EXEC(
‘
DECLARE @SortColumn ‘ + @type + ‘
SET ROWCOUNT ‘ + @strStartRow + ‘
SELECT @SortColumn=‘ + @strSortColumn + ‘ FROM ‘ + @Tables + @strFilter + ‘ ‘ + @strGroup + ‘ ORDER BY ‘ + @Sort + ‘
SET ROWCOUNT ‘ + @strPageSize + ‘
SELECT ‘ + @Fields + ‘ FROM ‘ + @Tables + ‘ WHERE ‘ + @strSortColumn + @operator + ‘ @SortColumn ‘ + @strSimpleFilter + ‘ ‘ + @strGroup + ‘ ORDER BY ‘ + @Sort + ‘
‘
)