分页存储过程

-- Add the parameters for the stored procedure here
-- =============================================

-- ALTER  date: <2007-05-30>
-- Description:    <读取数据记录数量>
-- =============================================
CREATE PROCEDURE ComPagerCount(
    @Tables varchar(50),            --表
    @PrimaryKey varchar(50),        --主键
    @Filter varchar(800) = NULL,    --:条件过滤，不带 Where
    @Sort varchar(200) = Null,        --:排序，不带 order by
    @PageSize int,                    --分页大小
    @CurrentPage int,                --分页索引
    @docount bit                    --if true 则仅读取总记录数
)
as
Declare @sCondit varchar(800)
Declare @sOrder  varchar(200)
if @Filter IS NOT NULL AND @Filter != ''
    SET @sCondit = ' WHERE ' + @Filter
else
    SET @sCondit = ''
if @Sort IS Null And @Sort = ''
    Set @sOrder = ' ORDER By '+ @PrimaryKey
else
    Set @sOrder = ' ORDER By '+ @Sort
BEGIN
  Begin Tran
    set nocount on
    IF(@docount=1)
      exec('select count('+ @PrimaryKey +') from '+ @Tables + @sCondit)
    ELSE
    begin
      declare @PageLowerBound int
      declare @PageUpperBound int
      set @PageLowerBound=(@CurrentPage-1)*@PageSize
      set @PageUpperBound=@PageLowerBound+@PageSize
      create table #pageindex(id int identity(1,1) not null,nid int)
      set rowcount @PageUpperBound
      exec('insert into #pageindex(nid)
      select '+ @PrimaryKey +' from '+ @Tables + @sCondit + @sOrder )
   
      Exec('SELECT O.* FROM '+ @Tables +' O,#pageindex p WHERE O.'
      + @PrimaryKey +'=p.nid and p.id>'+ @PageLowerBound +' and p.id<='+ @PageUpperBound +' order by p.id')
    END
    set nocount off
  If (@@Error=0) Commit Tran
  Else ROLLBACK Tran
END



GO




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

***************************************************************/
CREATE  PROCEDURE ComPagerData(
    @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