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bbs的数据结构和存储过程(三)

关注+2004-11-07作者:蓝点

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

/* */

/* procedure : up_GetPostedTopicList */

/* */

/* Description: 精华区贴子列表 */

/* */

/* Parameters: @a_intForumID : 版面id */

/* @a_intPageNo: 页号 */

/* @a_intPageSize: 每页显示数,以根贴为准 */

/* */

/* Use table: bbs , forum */

/* */

/* Author: bigeagle@163.net */

/* */

/* Date: 2000/2/14 */

/* */

/* History: */

/* */

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

if exists(select * from sysobjects where id = object_id('up_GetPostedTopicList'))

drop proc up_GetPostedTopicList

go



create proc up_GetPostedTopicList

@a_intForumID int ,

@a_intPageNo int ,

@a_intPageSize int

as

/*定义局部变量*/

declare @intBeginID int

declare @intEndID int

declare @intRootRecordCount int

declare @intPageCount int

declare @intRowCount int

/*关闭计数*/

set nocount on



/*检测是否有这个版面*/

if not exists(select * from forum where id = @a_intForumID)

return (-1)



/*求总共根贴数*/

select @intRootRecordCount = count(*) from bbs where posted=1 and forumid=@a_intForumID

if (@intRootRecordCount = 0) --如果没有贴子,则返回零

return 0



/*判断页数是否正确*/

if (@a_intPageNo - 1) * @a_intPageSize > @intRootRecordCount

return (-1)



/*求开始rootID*/

set @intRowCount = (@a_intPageNo - 1) * @a_intPageSize + 1

/*限制条数*/

set rowcount @intRowCount

select @intBeginID = rootid from bbs where posted=1 and forumid=@a_intForumID

order by id desc



/*结束rootID*/

set @intRowCount = @a_intPageNo * @a_intPageSize

/*限制条数*/

set rowcount @intRowCount

select @intEndID = rootid from bbs where posted=1 and forumid=@a_intForumID

order by id desc



/*恢复系统变量*/

set rowcount 0

set nocount off



select a.id , a.layer , a.forumid , a.subject , a.faceid , a.hits , a.time , a.UserID , a.fatherid , a.rootid ,

'Bytes' = datalength(a.content) , b.UserName , b.Email , b.HomePage , b.Signature , b.Point

from bbs as a join BBSUser as b on a.UserID = b.ID

where posted=1 and Forumid=@a_intForumID and a.rootid between @intEndID and @intBeginID

order by a.rootid desc , a.ordernum desc

return(@@rowcount)

--select @@rowcount

go

select id , rootid , fatherid , forumid , posted from bbs

up_getpostedtopiclist 3 ,1 , 20

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

/* */

/* procedure : up_GetTopic */

/* */

/* Description: 取贴子 */

/* */

/* Parameters: @a_intTopicID : 贴子id */

/* */

/* Use table: bbs */

/* */

/* Author: bigeagle@163.net */

/* */

/* Date: 2000/2/16 */

/* */

/* History: */

/* */

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

if exists(select * from sysobjects where id = object_id('up_GetTopic'))

drop proc up_GetTopic

go



create proc up_GetTopic @a_intTopicID int

as

/*如果没有这贴子*/

if not exists (select * from bbs where id = @a_intTopicID)

return (-1)



/*更新该贴的点击数*/

update bbs set hits = hits + 1 where id = @a_intTopicID



select a.* , 'Bytes' = datalength(a.content) ,

b.UserName , b.Email , b.Homepage , b.point , b.Signature

from bbs as a join BBSUser as b on a.UserID = b.id

where a.id = @a_intTopicID

go



up_getTopic 11



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

/* */

/* procedure : up_DeleTopic */

/* */

/* Description: 删除贴子及子贴,更新发贴人信息 */

/* */

/* Parameters: @a_intTopicID : 贴子id */

/* */

/* Use table: bbs */

/* */

/* Author: bigeagle@163.net */

/* */

/* Date: 2000/2/24 */

/* */

/* History: */

/* */

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



if exists(select * from sysobjects where id = object_id('up_DeleTopic'))

drop proc up_DeleTopic

go



create proc up_DeleTopic @a_intTopicID int

as



/*定义局部变量*/

declare @intRootID int

declare @intLayer int

declare @floatOrderNum float(53)

declare @floatNextOrderNum float(53)

declare @intCounts int

declare @intForumID int



/*取消计数*/

set nocount on



/*首先查找这个贴子的rootid和ordernum,没有则返回*/

select @intRootID = RootID ,

@floatOrderNum = OrderNum ,

@intLayer = layer ,

@intForumID = forumid

from bbs where id = @a_intTopicID

if @@rowcount = 0

return (-1)



/*取下一个同层贴子的ordernum*/

select @FloatNextOrderNum = isnull(max(ordernum) , 0)

from bbs

where RootID=@intRootID

and layer=@intLayer and ordernum < @floatOrderNum



/*多表操作,用事务*/

begin transaction



/*首先删贴*/



delete from bbs

where rootid=@intRootID and ordernum > @floatNextOrderNum

and ordernum <= @floatOrderNum

select @intCounts = @@rowcount

if (@@error != 0)

goto Error







/*论坛贴子数减少*/

update forum set topiccount = topiccount - @intCounts where id=@intForumID

if (@@error != 0)

goto Error



/*完成事务,返回*/

commit transaction

set nocount off

return(0)



Error:

rollback transaction

set nocount off

return (-1)

go



select forumid from bbs

update bbs set forumid=4



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

/* */

/* procedure : up_GetUserInfo */

/* */

/* Description: 取得发贴人信息 */

/* */

/* Parameters: @a_strUserName : 用户笔名 */

/* */

/* Use table: bbsuser */

/* */

/* Author: bigeagle@163.net */

/* */

/* Date: 2000/4/16 */

/* */

/* History: */

/* */

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

if exists(select * from sysobjects where id = object_id('up_GetUserInfo'))

drop proc up_GetUserInfo

go



create proc up_GetUserInfo @a_strUserName varchar(20)

as

declare @m_intOrder int --排名

declare @m_intPoint int --积分



set nocount on



/*如果没有找到该用户,则返回-1*/

select @m_intPoint = point from bbsuser where username=@a_strUserName

if(@@rowcount = 0)

return(-1)



/*求排名*/

select @m_intOrder = count(*) + 1 from bbsuser where point > @m_intPoint



select * , 'order' = @m_intOrder from bbsuser where username=@a_strUserName



set nocount off

go

up_getuserinfo '廖家远'



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

/* */

/* procedure : up_PostedTopic */

/* */

/* Description: 将贴子转入精华区 */

/* */

/* Parameters: @a_intTopicID 贴子id */

/* */

/* Use table: bbs, postedtopic */

/* */

/* Author: bigeagle@163.net */

/* */

/* Date: 2000/4/17 */

/* */

/* History: */

/* */

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



if exists(select * from sysobjects where id= object_id('up_postedtopic'))

drop proc up_postedtopic

go



create proc up_PostedTopic @a_intTopicID int

as

/*定义局部变量*/

declare @m_intUserID int --发贴人ID



/*查找是否有这个贴子*/

select @m_intUserID = userid from bbs where id = @a_intTopicID

if(@@rowcount != 1)

return -1



/*因为对两个表操作所以用事务*/

begin transaction

update bbs set posted = 1 where id = @a_intTopicID

if(@@error <> 0)

goto Error

update bbsuser set point = point + 3 where id = @m_intUserID

if(@@error <> 0)

goto Error

Commit transaction

return (0)

Error:

rollback transaction

go






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