SQL SERVER 分页存储过程

存储过程代码：
 --drop procedure p_page
--go
create procedure p_page
(
@Tables varchar(1000), --表名如testtable
@PrimaryKey varchar(100),--表的主键,必须唯一性
@Sort varchar(200) = NULL,--排序字段如f_Name asc或f_name desc(注意只能有一个排序字段)
@CurrentPage int = 1,--当前页
@PageSize int = 10,---每页大小
@Fields varchar(1000) = '*',--显示的字段列表
@Filter varchar(1000) = NULL,--条件语句,不加where,如 f_id>3
@Group varchar(1000) = NULL,--分组字段
@TotalPage int output --返回总页数
)
WITH ENCRYPTION ---加密存储
AS
SET NOCOUNT ON
Declare @intResult Int
Begin Tran
DECLARE @sql nvarchar(4000)

if @Filter is null or @Filter=''
set @Sql = 'select @intResult = count(' + @PrimaryKey + ') from ' + @Tables
else
set @Sql = 'select @intResult = count(' + @PrimaryKey + ') from ' + @Tables + ' where + ' + @Filter
EXEC sp_executesql @sql,N'@intResult int OUTPUT',@intResult OUTPUT--计算总记录数
select @TotalPage=CEILING((@intResult+0.0)/@PageSize)--计算总页数


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

IF CHARINDEX('DESC',@Sort)>0
BEGIN
SET @strSortColumn = REPLACE(@Sort, 'DESC', '')
SET @operator = '<='
END
ELSE
IF CHARINDEX('ASC', @Sort) > 0
BEGIN
SET @strSortColumn = REPLACE(@Sort, 'ASC', '')
SET @operator = '>='
END

ELSE
BEGIN
SET @strSortColumn = @SORT
SET @operator = '>='
END

IF CHARINDEX('.', @str