千万数量级分页存储过程

Create PROCEDURE SP_Pagination

/*

***************************************************************

** 千万数量级分页存储过程 **

***************************************************************

参数说明:

1.Tables :表名称,视图

2.PrimaryKey :主关键字

3.Sort :排序语句，不带Order By 比如：NewsID Desc,OrderRows Asc

4.CurrentPage :当前页码

5.PageSize :分页尺寸

6.Filter :过滤语句，不带Where 

7.Group :Group语句,不带Group By

效果演示：http://www.cn5135.com/_App/Enterprise/QueryResult.aspx

***************************************************************/

(

@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 + '

')

GO