mssql 分页store procedure-根据自动增长主键的大小分页

mssql分页store procedure-根据自动增长主键的大小分页

USE [DBS_REG_2012]
GO
/****** 对象: StoredProcedure [dbo].[SP_GetPage] 脚本日期: 08/03/2012 14:23:57 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
set nocount off
go

 

ALTER PROC [dbo].[SP_GetPage]
(
@tbname nvarchar(100), --要分页显示的表名
@FieldKey nvarchar(1000), --用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1, --要显示的页码
@PageSize int=20, --每页的大小(记录数)
@FieldShow nvarchar(1000)='', --以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder nvarchar(1000)='', --以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
@WhereString nvarchar(1000)=N'', --查询条件
@RecordCount int OUTPUT --总记录数
)
AS
SET NOCOUNT ON

--检查对象是否有效
IF OBJECT_ID(@tbname) IS NULL
BEGIN
RAISERROR(N'The ojbect "%s" not exists.',1,16,@tbname)
RETURN
END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTable')=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsView')=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTableFunction')=0
BEGIN
RAISERROR(N'"%s" not table, views or table values function.',1,16,@tbname)
RETURN
END

--分页字段检查
IF ISNULL(@FieldKey,N'')=''
BEGIN
RAISERROR(N'Paging processing need primary key (or the unique key).',1,16)
RETURN
END

--其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=20
IF ISNULL(@FieldShow,N'')=N'' SET @FieldShow=N'*'
IF ISNULL(@FieldOrder,N'')=N''
SET @FieldOrder=N''
ELSE
SET @FieldOrder=N'ORDER BY '+LTRIM(@FieldOrder)
IF ISNULL(@WhereString,N'')=N''
SET @WhereString=N'1=1'

--如果@RecordCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@RecordCount赋值)
IF @RecordCount IS NULL
BEGIN
DECLARE @sql nvarchar(4000)
SET @sql=N'SELECT @RecordCount=COUNT(*)'
+N' FROM '+@tbname
+N' where '+@WhereString
EXEC sp_executesql @sql,N'@RecordCount int OUTPUT',@RecordCount OUTPUT
END

--计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20)
SELECT @TopN=@PageSize,
@TopN1=(@PageCurrent-1)*@PageSize

--第一页直接显示
IF @PageCurrent=1
EXEC(N'SELECT TOP '+@TopN
+N' '+@FieldShow
+N' FROM '+@tbname
+N' where '+@WhereString
+N' '+@FieldOrder)
ELSE
BEGIN

execute('SELECT TOP('+@TopN+') '+@FieldShow+'
FROM '+@tbname+' a
WHERE a.'+@FieldKey+'>(
SELECT max(d.'+@FieldKey+') as keyID
FROM
(
SELECT top '+@TopN1+' b.'+@FieldKey+'
FROM '+@tbname+' b
ORDER BY '+@FieldKey+'
)
AS d
) and '+@WhereString+' '+@FieldOrder+'
')
END

go

declare @total int
execute [SP_GetPage] 'Program','ProgramID',1,10,'*','','',@total output