实现千万级数据的分页显示

这是经我该写后的存储过程
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ALTER       PROCEDURE usp_GetRecordFromPage
    @tblName       varchar(1000),        -- 表名
    @SelectFieldName    varchar(4000),              -- 要显示的字段名(不要加select)
    @strWhere       varchar(4000),              -- 查询条件(注意: 不要加 where)
    @OrderFieldName      varchar(255),               -- 排序索引字段名
    @PageSize       int ,                 -- 页大小
    @PageIndex      int = 1,                  -- 页码
    @iRowCount      int output,                 -- 返回记录总数
    @OrderType      bit = 0                  -- 设置排序类型, 非 0 值则降序
          
AS

declare @strSQL    varchar(4000)       -- 主语句
declare @strTmp    varchar(4000)        -- 临时变量
declare @strOrder  varchar(400)        -- 排序类型
declare @strRowCount    nvarchar(4000)      -- 用于查询记录总数的语句

set @OrderFieldName=ltrim(rtrim(@OrderFieldName))

if @OrderType != 0
begin
    set @strTmp = '<(select min'
    set @strOrder = ' order by ' + @OrderFieldName +' desc'
end
else
begin
    set @strTmp = '>(select max'
    set @strOrder = ' order by ' + @OrderFieldName +' asc'
end

set @strSQL = 'select top ' + str(@PageSize) + @SelectFieldName+' from '
    + @tblName + ' where ' + @OrderFieldName + @strTmp + '('
    + right(@OrderFieldName,len(@OrderFieldName)-charindex('.',@OrderFieldName)) + ') from (select top ' + str((@PageIndex-1)*@PageSize)
    + @OrderFieldName + ' from ' + @tblName  + @strOrder + ') as tblTmp)'
    + @strOrder

if @strWhere != ''
    set @strSQL = 'select top ' + str(@PageSize) + @SelectFieldName+' from '
        + @tblName + ' where ' + @OrderFieldName + @strTmp + '('
        + right(@OrderFieldName,len(@OrderFieldName)-charindex('.',@OrderFieldName)) + ') from (select top ' + str((@PageIndex-1)*@PageSize)
        + @OrderFieldName + ' from ' + @tblName + ' where ' + @strWhere + ' '
        + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder

if @PageIndex = 1
begin
    set @strTmp = ''
    if @strWhere != ''
        set @strTmp = ' where ' + @strWhere

    set @strSQL = 'select top ' + str(@PageSize) + @SelectFieldName+' from '
        + @tblName + @strTmp + ' ' + @strOrder
end

exec(@strSQL)
 
if @strWhere!=''
begin
  set @strRowCount = 'select @iRowCount=count(*) from ' + @tblName+' where '+@strWhere
end
else
begin
  set @strRowCount = 'select @iRowCount=count(*) from ' + @tblName
end

exec sp_executesql @strRowCount,N'@iRowCount int out',@iRowCount out

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